I find it curious that not so many people talk about Sun. The guy is a little ray of sunshine to the girl who caught his eye and he even tried to make her face her condition as a Faunus when they weren't even close. He's obviously a catch!
Sun is a great character who truly took care of Blake when she needed it. He's sweet, funny, a great fighter, a great listener, non-judgmental, and cool. But he gets in the way of the popular ship Bumblebee (no, I am not misspelling it to "bumbleby" so don't ask) so people hate him. Poor guy!